thompson



E. B. THOMPSON.

PUMP MECHANISM. APPLICATION FILED JAN. I6, 1922.

licissued July 18, 192 2. Y 1 5,4 1 5 2 SHEETS-SHEET I.

E. B. THOMPSON.

P'UMP MECHANISM.

APPLlCATl UN FILED JAN. 16, 1922.

2 SHEETS- -SHEET 2.

Rvissucd July 18, 1922.

.fzwentor Elmer 1?.Tfi0mp5022 UNITED; STATES, PATENT OFFICE- armint n. momrsonfor nrs aromas, IOWA, ASSIGNOR T 'rnomrsorr nutcrac- TUBING COMPANY, or mas momns, Iowa.

PUMP MECHANISM.

Specification of Reissued letters latent. Reissued July 18, 1922 Original in. 1,156,724, dated October 12, 1a15,,sem1 No. 842,712, filed me 3, 1914. Application in reissue filed January 16, 1922-.

pump for creating a suction within the collector being of novel form to insure service and durability.

Another object of the invention is the provision of a pump mechanism of this character wherein the same is positive in ac tion and practically frictionless when operating.

A further object of theinvention is the provision- 0f a pump mechanism of this character which is extremely simple in construction, thoroughly reliable and eflicient in its operation, and inexpensive 1n manufacture.

With these and other objects in view, the invention consists in the construction, combination and arrangement of parts as will be hereinafter fully described, illustrated in the accompanying drawings, and pointed out in the'claims hereunto appended.

In the drawings Figure 1 is aside elevation of a machln constructed in accordance with the invention.

tional View through the collector.

Figure 3 is a vertical, transverse sectional ,view thereof.

Fi ure 2 is a vertical lon itudinal sech g supported by a hollow. base or pedestal 24 Serial no. 529,781.

dust collector comprises shaped or box-like casing. 10 formed with-a base 11 for supporting the same. Formed in one side of the case 10 are suitable ports 12 which are adapted to be normally closed by means of cover plates l3 detachably secured to the outer face of the case in any suitable manner, and on the removal of the plates 13 access ma -be had to the interior of the casefor the c caning of the same.

Arranged within the case 10 are spaced vertically disposed partitions 1 1 and 15 respectively, the partitions 14 being extended from the top of the case toward and terminating spaced from the bottom, while the a v rectangnlari partition 15 extends from the bottomv toward and terminates spaced from the top of the case so as to form communicating compartments 16, 17,18 and 19 therein. By

reason of the internal arrangement of the case, the air introduced into the collector is compelled to pass therethrough along the ClICllitOllS course indicated by the arrows. Leading to the compartment 16 through the top of the case 10 is an inlet pipe 20 which is adapted to extend to or into a closure so that on the working of the collector dust laden air will be conveyed through the pipe 20 into the case 10 for the separation of the dust from the air in manner presently described.

Mounted'upon the top of the case 10 directly above the compartment 19 is a pump having an intake compartment 19, and an exhaust which may extend to any desirable point, the ump being hereinafter fully described.

.T e pump comprises an outer cylinder 23 which is fixed in any suitable manner to the top of the casing 10 and within the cylinder 23 is eccentrically mounted'an inner cylinder 24', the'sa'me being supported upon eccentrics 25 integral-with a driving shaft 26 which is passed through the ends of the outer'cylinder 23, the shaft being surrounded by means of bearing balls 27'suitably seated in the bearings 28 formed on the pipe 21 leading from the pipe 22 ends of the outer cylinder. Likewise surrounding the eccentrics 25 are bearing balls 29 which are held in any suitable manner in the openings for receiving the eccentrics in the ends of the cylinder 24'. On one end joint connection with each other. The oppoof the shaft 26 is fitted a belt pulley 30 over which is trained an endless belt 31, the same being trained over a belt pulley 32 fixed to blade or wing 37 which is co-extensive withthe length of the said inner cylinder and is projected into the hollow base or pedestal 24:

of the pump case 23, the free edge of the said plate or wing 37 being formed with a circular portion 38 which loosely fits within a correspondingly shaped groove 39 formed in an upturned flange 40 on a hinged plate 41.

so that the wing or blade will have knucklesite upturned flange of the plate is formed with a groove 43 receiving the rounded portion 4-2 of a hangerA i which is fixed integral with one wall of the pedestal and in this manner the said plate 41 can readily swing to allow for the variance in the stroke of the wing or blade during the eccentric movement of the inner cylinder 24: Within the outer cylinder 23 of the pump. Arranged beneath the plate 41 and working against the same are coiled expansion springs 46 which are seated in any suitable manner and serve as counterbalancing means for the inner cylinder and plate 41 during the working of the inner cylinder. It will be apparent that when the inner cylinder 24' is eccentrically shifted the concentric space 47 between the periphery thereof and the wall of the cylinder 23 will be varied for creating a suction at one side of the blade 37 while at the opposite side of the latter an exhaust takes place- -thus insuring a constant suction within the pump. The-pedestal or base is formed with ,an inlet port 48 which communicates with the pipe 21 while at the opposite side'ofthe blade or wing 37 is an outlet portion 49 with which communicates the exhaust pipe 22 so that I air will be sucked into the pump through the pipe 21 and exhausted therefrom through the pipe 22 during the working ofthe dust collector.

' The lower end of the pedestal 24 of the pump is adapted to contain oil for lubricating the parts thereof and this oil is prevented from being blown out through the exhaust pipe 22 bymeans of a baflle or guard plate '50 which extends horizontally toward the hinged plate 41 within the pedestal of the pump cylinder.

Suitably fixed to the top of the case 10 and "depending within the compartment 19 is a downwardly tapered filtering bag 51 which prevents the dust and foreign matter from entering the pump through the pipe 21 when the collector is in action.

From the foregoing, it is thought thatthe construction and manner of operation of the devices will be clearly understood, and there fore a more extended explanation has-been omitted.

Having thus described the invention, what I claim as new is:

1'. A'pump comprising a stationary outer cylinder, a hollow support therefor communicating with the same-and having intake and exhaust ports, an eccentrically movable inner cylinder within the said outer cylinder for contact at one point in its periphery with the wall of the latter, a wing at the periphery of the inner cylinder and extended into the hollow support, a plate flexibly connecting the wing with-one wall of the support below one of the ports to shut off communication between the spaces at the opposite sides of the said wing within the cylinder and support, and counterbalancing means for the plate and inner cylinder.

2. A pump comprising a stationary outer cylinder. a hollow support therefor communicating with the same and having intake and exhaust ports, an eccentrically movable inner cylinder within the said outer cylinder for contact at one point in its periphery with the wall of the latter, a wing at the periphery of the inner cylinder and extended into the hollow support, a plate flexibly connecting the wing with one Wall of the support below one of the ports to shut ofl' communicatiion between the spaces at opposite sides of the said wing within the cylinder and support, resilient means for counterbalancing the plate and inner cylinder, and a deflector extension within the support below the other port. Y

3. A pump comprising a stationary outer cylinder, a hollow. support therefor com municating with the same and having intake and exhaust ports, an eccentrically movable inner cylinder Within the said outer cylinder forcontact at one point in its periphery with the wall of the latter, a wing at the periphery of the inner. cylinder and extended into the hollow support, a plate flexibly connecting the wing with one wall of the support below one ofthe ports to shut off communication between the spaces atoposite sides of the said-wing within the cy inder 'and support, resilient means for. counterbalancing the plate and inner cylinder, a deflector extension within the support below the other port, and meansformoving the inner cylinder.

Des Moines, Iowa November 3, 1921.

LMER B. THOMPSON. 

